you take up the space you need, you manspread to fulfill your need naturally, not to bother others becuz ur an insecure fag, but just naturally.
you look people in the eyes. you never back down first out of a staring contest on the street. but you look at people with the most naturally neutral stare, because you're not trying to scare people away.
you're not trying to shove your "mashcooliniteh" in other people's faces, you're just trying to be your own unbreakable, physically relevant person.
you don't judge, you don't look at people with hostility. your body language and your face will tell people "this guys is cool, he poses no threat to me".
Open body posture and genuine smiles will get you of almost every possibly bad social, tense or conflictual situation you can imagine.
Conversely, you DON'T act like a
>nice guy
meaning you're not fidgity and approval seeking and anxious and tense, you are just open and kind, but you do what you want to.
This will balance things out in the sense that people tend to take advantage of those they percieve as naively kind/open. You don't wanna appear naively open, you just wanna have a good vibe around you.
You could also squint and throw knives with your eyes at every single object and always have at least a neutral, if not a positive face at every single human being. This will encode the "I have good vibes but I don't like things standing in my way" mentality.
And dress cool, groom yourself appropriately, not like a faggot, but take care of yourself.
Have neat hair, ALWAYS. Clean up your face of spots etc.
Grooming and clothes that fit you as an individual and have a discernible style are things you should never think twice about investing in. The return on healthy skin, neat hair and good clothes is unquantifiable.
Also, smell nice. NICE, not cheaply. Nice. Ask a girl in the store to pick something for ya if you don't know what nice is.
It doesn't matter how tall or skinny you are.